• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Engineering and Performance >Mechanical Properties and Corrosion Behavior of CeO2 and SiC Incorporated Al5083 Alloy Surface Composites
【24h】

Mechanical Properties and Corrosion Behavior of CeO2 and SiC Incorporated Al5083 Alloy Surface Composites

机译：CeO2和SiC结合的Al5083合金表面复合材料的力学性能和腐蚀行为

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this investigation, nano-sized cerium oxide (CeO2) and silicon carbide (SiC) particles were stirred and mixed into the surface of an Al5083 alloy rolled plate using friction stir processing (FSP) to form a surface nano-composite layer. For this purpose, various volume ratios of the reinforcements either separately or in the combined form were packed into a pre-machined groove on the surface of the plate. Microstructural features, mechanical properties, and corrosion behavior of the resultant surface composites were determined. Microstructural analysis, optical microscopy and scanning electron microscopy, showed that reinforcement particles were fairly dispersed inside the stir zone and grain refinement was gained. Compared with the base alloy, all of the FSP composites showed higher hardness and tensile strength values with the maximum being obtained for the composite containing 100% SiC particles, i.e., Al5083/SiC. The corrosion behavior of the samples was studied by conducting potentiodynamic polarization tests and assessed in terms of corrosion potential, pitting potential, and passivation range. The result shows a significant increase in corrosion resistance of the base alloy; i.e., the longest passivation range when CeO2 alone was incorporated into the surface by acting as cathodic inhibitors. Composites reinforced with SiC particles exhibited lower pitting resistance due to the formation of microgalvanic couples between cathodic SiC particles and anodic aluminum matrix. The study was aimed to fabricate metal matrix surface composites with improved hardness, tensile strength, and corrosion resistance by the incorporation of CeO2 and SiC reinforcement particles into the surface of Al5083 base alloy. Optimum mechanical properties and corrosion resistance were obtained for the FSP composite Al5083/(75%CeO2 + 25%SiC). In this particular FSP composite, hardness and tensile strength were increased by 30, and 14%, respectively, and passivation range was increased to 0.19 V/SCE compared to the base alloy with no passivation range.
机译：在这项研究中，使用摩擦搅拌工艺（FSP）将纳米级氧化铈（CeO2）和碳化硅（SiC）颗粒搅拌并混合到Al5083合金轧制板的表面，以形成表面纳米复合材料层。为此，将不同体积比的增强材料分别或以组合形式填充到板表面上的预加工凹槽中。确定了所得表面复合材料的微观结构特征，力学性能和腐蚀行为。微观结构分析，光学显微镜和扫描电子显微镜显示，增强颗粒均匀地分散在搅拌区内，并获得了晶粒细化。与基础合金相比，所有FSP复合材料均显示出更高的硬度和抗拉强度值，其中包含100％SiC颗粒（即Al5083 / SiC）的复合材料获得了最大值。通过进行电位动力学极化试验研究了样品的腐蚀行为，并根据腐蚀电位，点蚀电位和钝化范围进行了评估。结果表明，基础合金的耐蚀性显着提高。即，当单独使用CeO2作为阴极抑制剂掺入表面时，钝化范围最长。用SiC颗粒增强的复合材料由于在阴极SiC颗粒和阳极铝基体之间形成了微电偶，因此具有较低的抗点蚀性。该研究旨在通过将CeO2和SiC增强颗粒掺入Al5083基合金表面来制造具有改善的硬度，拉伸强度和耐腐蚀性的金属基体表面复合材料。对于FSP复合材料Al5083 /（75％CeO2 + 25％SiC），可以获得最佳的机械性能和耐腐蚀性。与没有钝化范围的基础合金相比，在这种特殊的FSP复合材料中，硬度和抗拉强度分别增加了30％和14％，钝化范围增加到0.19 V / SCE。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号